1. The threemirror anastigmatic system includes two aspherical concave mirrors and a spherical convex mirror.

2. The automatic of an aspherical lens in front of a fibre - scope depends on the working distance.

3. Using molding methods to produce small aspherical elements is the best economic way with the best repetitiveness.

4. In order to test concave aspherical surfaces precisely, a binary phase twin computer-generated hologram(CGH) is proposed and designed.

5. The paper introduced how to use aspherical lens in the design of varifocal beam expander system.

6. Also , especially when aspherical, an effective way to vaporize excess cash for almost no good reason.

7. A new method to fabricate aspherical compound lens was proposed.

8. The designing and making of an aspherical lens have become easier owing to the development of computator technology.

9. The Optical Transfer Function of an afocal aspherical and non-coaxial optical system is also calculated.

10. The characteristic of aplanatic system shows that non-aplanatic point imaging can produce aspherical holographic interference for high resolution zone plate fabrication used for X-ray imaging.

11. An error compensation control method which can improve contour tracing accuracy of aspherical surface ultraprecise machine is introduced.

12. By means of null compensator testing , an off - axis aspherical mirrora lager - aperture rectangle is tested successfully.

13. It is a key step of manufacturing the large relative aperture aspherical surface to make a breakthrough at the technology.

14. This paper presents the design principle and method of an opticalfor plastic aspherical door scope.

15. A new method for fabricating micro - optical elements with aspherical outlines is discussed.

16. The method reduces the noise caused by discrete phase on reconstructing imago. This method can apply to either spherical or aspherical kind of Kinoform with axial rotating symmetry.

16. try its best to gather and build good sentences.

17. Optimal stitching algorithm is extremely important for testing large - aperture aspherical optical elements by annular - aperture scanning technique.

18. Radius of curvature is an important parameter in machining and measuring aspherical mirrors and in optical alignment.